Question

One end of a light spring of spring constant ‘k’ is fixed to a wall and the other end is tied to a block placed on a smooth horizontal surface . An external force
F applied to the block due to which the spring is compressed by distance ‘x’
(i) Write the expression for work done by the
(a) external force and by the
(b) Spring force during compression of the spring

Answer 1

Answer:

Correct option is

A

The spring was initally compressed by a distance x and was finally in its nautral length

B

It was initially streteched by a distance x and finally was in its natural length

It is given that the work done by the spring force is positive.

Spring force is always towards mean position hence the displacement should also be towards the mean position.

So, the spring has to be in the compressed state first, for both the spring force and the displacement to be in the same direction.

Option A and B.

Explanation:

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